When enthalpy and entropy change for a chemical reaction are – 2.5 x 10³ cals and 7.4 cals deg⁻¹ respectively predict the reaction at 298 K is
Options
(a) irreversible (b) reversible (c) spontaneous […]
Chemical bond implies
Options
(a) attraction and repulsion (b) attraction and repulsion balanced at a particular distance (c) attraction (d) repulsion
Correct Answer:
attraction and repulsion balanced at a particular distance
Explanation:
No […]
Which of the following inert gases does not have eight electrons in the outermost orbit
Options
(a) Kr (b) Ne (c) He (d) Ar
Correct Answer:
He
Explanation:
It has two electron in its […]
Element having atomic no.of 56 belongs to which of the following block of periodic table
Options
(a) p-block (b) d-block (c) f-block (d) s-block
Correct Answer:
s-block
Explanation:
Consider Barium having atomic number 56
Which of the following explains the sequence of filling the electrons in different shells
Options
(a) Aufbau principle (b) Hund’s rule (c) Octate rule (d) all of these
Correct Answer:
Aufbau principle
Explanation: […]
The maximum energy is possessed by an electrons,when it is present
Options
(a) in first excited state (b) in nucleus (c) at infinite distance from the nucleus (d) in ground energy state
Correct […]
The equivalent mass of Fe in FeO is
Options
(a) 56 (b) 28 (c) 36 (d) 18.66
Correct Answer:
28
Explanation:
No explanation available. Be the first to write the explanation for this […]
The most suitable method of the separation of a 1:1 mixture of ortho-and para-nitrophenols is
Options
(a) filtration (b) sublimation (c) crystallisation (d) steam distillation
Correct Answer:
steam distillation
Explanation:
Steam distillation is […]
Helium atom is two times heavier than a hydrogen molecule, At 298 K, the average kinetic energy of the helium atom is
Options
(a) two times that of a hydrogen molecule (b) same […]
If 1 litre of N₂ is mixed with 2 litre of O₂, quantity explaining it is
Options
(a) Kinetic energy (b) partial pressure (c) rate of diffusion (d) none of these
Correct Answer: […]
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